Raypak 85, 120 manual Principle Components, Banned Material Statement, Safety Devices

PRINCIPLE COMPONENTS

A fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, actuator anti-block function, self-diagnostic fault indicator, full air/gas modulation.

-Radial aluminum heat exchanger.

-Electronic ignition with flame supervision

-Integral pump

-Fan

-Water pressure switch

-Condensate level sensor

-Pressure gauge

-Pressure relief valve

-Flue thermostat

-Flue sensor

-Blocked flue switch

BANNED MATERIAL STATEMENT:

No banned materials or substances have been used in the manufacture or production of this appliance or its inherent components

MANUAL HANDLING STATEMENT:

CAUTION: This appliance may require 2 or more persons to lift or carry it to the installation location; due to the weight of the appliance it may be necessary for two people to lift and attach the appliance to its mounting. To avoid the possibility of injury during the installation, servicing or cleaning of this appliance, care should be taken when handling component edges.

MODE OF OPERATION (AT REST)

When the appliance is at rest and there are no requests for heating or hot water, the following functions are active:

-2-stage freeze protection system – the freeze protection system protects the appliance against the risk of freeze damage. The first stage enables activation of the pump should the tempera- ture of the appliance fall to 43°F (6oC). Should the first stage become active, the appliance will function on minimum +25% power until it reaches 95°F (35oC).

-Anti-seize function – the anti-seize function enables the pump to be energized for short periods, when the appliance has been inactive for more than 24-hours.

XPAK INTERNAL HYDRAULIC CIRCUIT (FIG. 2)

MODE OF OPERATION

When there is a request for heat and/or hot water, via the programmer/time clock and/or any external control, the pump and fan are started, the fan speed will modulate until the correct signal voltage is received at the control PCB. At this point an ignition sequence is enabled.

Ignition is sensed by the electronic circuitry to ensure flame stability at the burner. Once successful ignition has been achieved, the electronic circuitry increases the gas rate to 75% of the MAX Heating (set by the corresponding HTG trimmer) for a period of 15 minutes. Thereafter, the boiler’s output will either increase to maximum or modulate to suit the set requirement.

When the appliance reaches the desired temperature the burner will shut down and the boiler will perform a three-minute post purge (timer delay).

When the request for heat has been satisfied the appliance pump and fan may continue to operate to dissipate any residual heat within the appliance.

SAFETY DEVICES

When the appliance is in use, safe operation is ensured by:

-a water pressure switch that monitors system water pressure and will de-activate the pump (when lockout condition is reached), fan and burner should the system water pressure drop below the rated tolerance;

-blocked flue switch that monitors flue pressure and will de- activate the pump (when lockout condition is reached), fan and burner should the flue pressure increase over the rated tolerance;

-fan speed sensor to ensure safe operation of the burner;

-a high limit thermostat that over-rides the temperature control circuit to prevent or interrupt the operation of the burner;

-flame sensor that will shut down the burner when no flame signal is detected;

-a sensor that interrupts the operation of the appliance if the condensate pipe becomes blocked;

-a pressure relief valve which releases excess pressure from the primary circuit;

-a flue sensor that controls the flue temperature continuously checking to be right according the output;

-a flue thermostat that over-rides the temperature control circuit to prevent or interrupt the operation of the burner.

return

temperature

sensor

bottom auto air valve

pressure

switch

pump

automatic

bypass

top

flowauto air

temperaturevalve sensor

manual air

release

main heat exchanger

pressure

relief valve

drain valve

Heating	Heating	pressure
		relief valve
return	flow

Fig. 2

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